body{
    height: 100%;
    width: 100%;
}

/* 返回json数据的接口，学习用的，不显示 */
.open_door_from_html{
    display: flex;
    visibility: hidden;
}

/* open_door button*/
.open_door_from_js{
    padding: 25%;
    display: flex;
    justify-content: center;
    /* background: aqua; */
}

button{
    display: block;
    /* border-color: transparent; */
    /* background-color: transparent; */
    background-color: papayawhip;
    border-color: blanchedalmond;
    margin: 0 auto;
    padding: 15%;
    color: goldenrod;
    font-size: 90px;
}